Abstract: A wall construction formed from a plurality of pre-cast reinforced concrete building panels each of which includes interior and exterior faces defined peripherally by upper and lower end edges and opposed side edges extending therebetween. The plurality of panels includes two adjacent panels disposed in side by side relation. An improved welded joint is provided between two adjacent side edges of two adjacent side by side panels. The welded joint comprises a plurality of vertically spaced horizontally extending adjacent pairs of welding bars fixed within the two adjacent side edges respectively of the two side by side panels. A single line of welding material is provided for rigidly securing each pair of adjacent welding bars together. Alternatively a bridging plate is welded over each pair of adjacent bars by two lines of welding material.

Abstract: A building formed by assembling a multiplicity of pre-cast reinforced concrete panels including horizontal footer panels, solid exterior vertical panels, exterior vertical corner panels, exterior vertical door panels, exterior vertical window panels, interior solid vertical panels, interior vertical door panels, interior vertical partition panels, horizontal floor/ceiling panels, and horizontal ceiling/roof panels, the various panels being joined together in side-by-side relation by continuous welds of welding bars rigidly mounted to the reinforcing of the panels, the vertical panels being connected with the horizontal panels by connecting rod assemblies, the panels providing built-in electrical junction boxes and access wiring thereto, plumbing passageways and temperature air ducts.